Geography Unit 2: Natural Hazards Flashcards
what type of volcano is Eyjafjallajokull
composite
where is Eyjafjallajokull
Iceland
What is a natural hazard
Natural hazards: extreme natural events that can cause loss of life,
extreme damage to property and disrupt human activities.
what are the natural hazards?
Volcanic eruption, Tsunami, Earthquake, Tropical Storm
what is a plate boundary
• The Earth’s crust is broken up into tectonic plates.
• These can be:
• Continental- found under land masses
• Oceanic- found under the ocean
• Where two plates meet is called a plate boundary.
• Tectonic plates move due to convection (heat) currents in the mantle.
• Plates can move in different directions resulting in different types of
plate boundaries
what are the three types of plate boundary?
Constructive, destructive, and conservative
When did the Haiti earthquake occur?
4:53 pm Tuesday the 12th of January 2010.
why did the Haiti earthquake occur
Caused by the North American Plate
sliding past the Caribbean Plate at a
conservative plate margin.
When did the New Zealand earthquake occur?
12:51 pm Tuesday the 22th of
February 2011.
why did the New Zealand earthquake occur?
It was caused by the movement of
the Pacific plate subducting below
the Australian plate.
What is a volcano?
• A volcano is an opening in the Earth’s crust that
allows magma, hot ash and gases to escape.
What are Pyroclastic flows?
Hot avalanches of rock, ash, and gas that travel down volcano
slopes at high speeds. They may be very dangerous close to a
volcano.